<template>
  <div class="container top-category">
    <XtxBread>
      <XtxBreadItem to="/">首页</XtxBreadItem>
      <Transition name="fade-right" mode="out-in">
        <XtxBreadItem :key="category.id" v-if="category">
          {{ category?.name }}
        </XtxBreadItem>
      </Transition>
    </XtxBread>
    <!-- //轮播图 -->
    <XtxCarousel :sliders="sliders" style="height: 500px"></XtxCarousel>
    <!-- //全部分类 -->
    <!-- 所有二级分类 -->
    <div class="sub-list">
      <h3>全部分类</h3>
      <ul>
        <li v-for="item in category?.children" :key="item.key">
          <router-link :to="`/category/sub/${item.id}`">
            <img :src="item.picture" />
            <p>{{ item.name }}</p>
          </router-link>
        </li>
      </ul>
    </div>
    <!-- 分类关联商品 -->
    <div class="ref-goods" v-for="item in categoryList" :key="item.id">
      <div class="head">
        <h3>- {{ item.name }} -</h3>
        <p class="tag">温暖柔软，品质之选</p>
        <XtxMore />
      </div>
      <div class="body">
        <GoodsItem v-for="goods in item.goods" :key="goods.id" :goods="goods" />
      </div>
    </div>
  </div>
</template>

<script>
import { useRoute } from 'vue-router'
import { useStore } from 'vuex'
import { findBanner } from '@/api/home'
import { ref, computed, watch } from 'vue'
import GoodsItem from './components/goods-item'
import { findTopCategory } from '@/api/category'
export default {
  name: 'TopCategory',
  components: {
    GoodsItem
  },
  setup () {
    const store = useStore()
    const route = useRoute()
    // 获取一级分类数据
    const category = computed(() => {
      return store.state.category.list.find(item => item.id === route.params.id)
    })

    // 获取轮播图数据
    const sliders = ref([])
    findBanner().then(res => {
      sliders.value = res.result
    })

    // 获取二级分类数据
    // 由于setup函数只会执行一次 一级路由跳一级路由切换分类 数据不会发生变化,
    //   所以我们这里要监听路由的变化发送请求冲新获取数据
    const categoryList = ref([])
    watch(() => route.params.id, (value) => {
      if (route.path.includes('/sub')) return
      findTopCategory(route.params.id).then(data => {
        categoryList.value = data.result.children
      })
    }, { immediate: true })

    return {
      category,
      sliders,
      categoryList
    }
  }
}
</script>

<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }
  .sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
  .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;
    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }
      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }
    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
}
</style>

